11.1%

of 1,177 commits were committed by an AI agent — a floor, not an estimate

11.1% agent · top contributor 76.3%25 contributors

team

A small group is using agents. Adoption has spread beyond one person but is not project-wide.

131

agent commits

1,046

human commits

agent contributors

76.3%

largest contributor

Assisted or autonomous

130assisted

1autonomous

Assisted — a developer’s identity authored the commit and the agent added itself as co-author. The agent ran git commit during a working session, with a person there. Autonomous — a bot identity is the author, no human in the loop. Across the whole index, 93.7% of agent commits are assisted.

Agent share by month

Feb26

Mar26

Apr26

May26

Jun26

Jul26

Aug26

Sep26

Peak month: 36.3%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	120	10.2%
Cursor Agent	Anysphere	8	0.7%
GitHub Copilot	GitHub	2	0.2%
OpenAI Codex	OpenAI	1	0.1%

Verify it yourself

Sample commits that matched. Every one links to GitHub — check the trailers.

a7c30a58release: v1.6.8Claude Code
cc316f03test: stop letting one test decide what the next one resolvesClaude Code
8e40d723fix(questions): fail a plan with no templates, warn on a short one (#1325)Claude Code
39171df8fix(web): localize organized session placeholder titlesCursor Agent
ec3b12c4fix: set Secure attribute when clearing dt_token on logoutCursor Agent
a1d5f6a5fix: count streamed LLM usage once per completionCursor Agent
b020686cfix(json_parser): strip <think> reasoning tags before parsing (#675)GitHub Copilot
b05abd26fix: prevent duplicate quiz questions by removing duplicated knowledge_conGitHub Copilot
52f3dccddocs(assets): refresh 29 README screenshots for v1.6.1OpenAI Codex

What was excluded

Commits in window	1,551
Merge commits removed	−311
CI / dependency bots removed	−63
Considered	1,177

Bots are excluded from the denominator entirely. Counting dependabot as “AI-written code” is the fastest way to produce a meaningless number.

How this was measured

Measured over February–August 2026, cloned directly. Detection is deterministic string matching against signatures agents write about themselves — no heuristics, no style analysis. Merge commits and CI bots are excluded from the denominator. The figure is a floor: squash merges strip trailers, so real usage is higher. Contributor counts are aggregate — no individual is named.

Run it yourself: npx qmmit-cli HKUDS/DeepTutor

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